Home / 2,009.40-2,772.79-1,223.29

Finding the Fourth Proportional to 2,009.40, 2,772.79 and 1,223.29

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Solution

The fourth proportional to 2,009.40, 2,772.79 and 1,223.29 is: 1,688.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,009.40 : 2,772.79 = 1,223.29 : x
  2. Step 2: Convert to fraction form
    2,009.40/2,772.79 = 1,223.29/x
  3. Step 3: Cross multiply
    2,009.40x = 2,772.79 × 1,223.29
  4. Step 4: Simplify right side
    2,009.40x = 3,391,926.28
  5. Step 5: Solve for x
    x = 3,391,926.28/2,009.40
  6. Step 6: Final answer
    x = 1,688.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.